With temperatures barely above freezing and mostly cloudy skies, it was a chilly survey for our three volunteers this time. While we rarely see mammals, there are sometimes clues to their presence. The lower jaw (mandible) of an Opossum was one such find. As a marsupial, its teeth differ significantly from placental carnivores; for instance, foxes, raccoons and skunks have only 3 incisors where this jaw has 4. The bone is from an animal that died when it was about 4 months old, deduced by the presence of 5 premolars+molars. A 5-month-old would have 7 while a 3-month-old would have only 2.